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在超精密切削加工中,进刀量的控制是非常重要的一个方面,而现在机床上常见的进刀机构远不能实现超精密切削的要求,本文介绍一种可以进行超精密进刀量控制的装置——压电陶瓷式微动刀架。一、压电陶瓷压电陶瓷是一种具有ABO_3类型结晶构造的强感应材料,较出名的有PZT[Pb(Zr,Ti)O_3]系,其它还有PLZT[Pb,La)(Zr,Ti) O_3]系、PT(Pb TiO_3)系或以PZT为基的三成分系。它们烧固后由强直流电场进行极化处理,极化处理后便出现了压电性。如果施以方向和极化方向相同的直流电压,压电陶瓷便沿
In the ultra-precision machining, the amount of feed control is a very important aspect, and now the common machine tool infeed institutions can not achieve ultra-precision cutting requirements, this article describes a can be ultra-precision feed control Device - piezoelectric ceramic micro-turret. First, the piezoelectric ceramic piezoelectric ceramic ABO_3 type with a strong crystal structure of the material, the more famous PZT [Pb (Zr, Ti) O_3] system, there are other PLZT [Pb, La) (Zr, Ti ) O_3], PT (Pb TiO_3) or PZT-based three-component system. After they are burned, they are polarized by a strong DC electric field. After polarization, piezoelectricity occurs. If applied in the same direction and polarization of the DC voltage, piezoelectric ceramics will be along